Buried in the fine print of many of these promotions are terms which allow them to continuously ship and charge you for additional products.
That's what happened to Elayne Sawaya when she applied for free anti-aging pills and ended up paying two separate charges of at least $80.
"And I went ballistic cause I had opened it up while I was in the car and I thought, WHAT?," she said.
"It's really become a game of whack a mole trying to keep these websites down. You'll have one taken down and then another one will be up the next week or in a couple of days," said Alison Southwick from the Better Business Bureau.
The best advice when accepting free offers, never give credit card and checking account numbers.